XMPP queued output & initial retooling of DB queue manager to support non-Notice objects.

Queue handlers for XMPP individual & firehose output now send their XML stanzas
to another output queue instead of connecting directly to the chat server. This
lets us have as many general processing threads as we need, while all actual
XMPP input and output go through a single daemon with a single connection open.

This avoids problems with multiple connected resources:
* multiple windows shown in some chat clients (psi, gajim, kopete)
* extra load on server
* incoming message delivery forwarding issues

Database changes:
* queue_item drops 'notice_id' in favor of a 'frame' blob.
  This is based on Craig Andrews' work branch to generalize queues to take any
  object, but conservatively leaving out the serialization for now.
  Table updater (preserves any existing queued items) in db/rc3to09.sql

Code changes to watch out for:
* Queue handlers should now define a handle() method instead of handle_notice()
* QueueDaemon and XmppDaemon now share common i/o (IoMaster) and respawning
  thread management (RespawningDaemon) infrastructure.
* The polling XmppConfirmManager has been dropped, as the message is queued
  directly when saving IM settings.
* Enable $config['queue']['debug_memory'] to output current memory usage at
  each run through the event loop to watch for memory leaks

To do:
* Adapt XMPP i/o to component connection mode for multi-site support.
* XMPP input can also be broken out to a queue, which would allow the actual
  notice save etc to be handled by general queue threads.
* Make sure there are no problems with simply pushing serialized Notice objects
  to queues.
* Find a way to improve interactive performance of the database-backed queue
  handler; polling is pretty painful to XMPP.
* Possibly redo the way QueueHandlers are injected into a QueueManager. The
  grouping used to split out the XMPP output queue is a bit awkward.

1 files changed, 0 insertions, 168 deletions

diff --git a/lib/xmppconfirmmanager.php b/lib/xmppconfirmmanager.php
deleted file mode 100644
index ee4e294fd..000000000
--- a/lib/xmppconfirmmanager.php
+++ /dev/null
@@ -1,168 +0,0 @@
-<?php
-/*
- * StatusNet - the distributed open-source microblogging tool
- * Copyright (C) 2008-2010 StatusNet, Inc.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-if (!defined('STATUSNET') && !defined('LACONICA')) {
-    exit(1);
-}
-
-/**
- * Event handler for pushing new confirmations to Jabber users.
- * @fixme recommend redoing this on a queue-trigger model
- * @fixme expiration of old items got dropped in the past, put it back?
- */
-class XmppConfirmManager extends IoManager
-{
-
-    /**
-     * @return mixed XmppConfirmManager, or false if unneeded
-     */
-    public static function get()
-    {
-        if (common_config('xmpp', 'enabled')) {
-            $site = common_config('site', 'server');
-            return new XmppConfirmManager();
-        } else {
-            return false;
-        }
-    }
-
-    /**
-     * Tell the i/o master we need one instance for each supporting site
-     * being handled in this process.
-     */
-    public static function multiSite()
-    {
-        return IoManager::INSTANCE_PER_SITE;
-    }
-
-    function __construct()
-    {
-        $this->site = common_config('site', 'server');
-    }
-
-    /**
-     * 10 seconds? Really? That seems a bit frequent.
-     */
-    function pollInterval()
-    {
-        return 10;
-    }
-
-    /**
-     * Ping!
-     * @return boolean true if we found something
-     */
-    function poll()
-    {
-        $this->switchSite();
-        $confirm = $this->next_confirm();
-        if ($confirm) {
-            $this->handle_confirm($confirm);
-            return true;
-        } else {
-            return false;
-        }
-    }
-
-    protected function handle_confirm($confirm)
-    {
-        require_once INSTALLDIR . '/lib/jabber.php';
-
-        common_log(LOG_INFO, 'Sending confirmation for ' . $confirm->address);
-        $user = User::staticGet($confirm->user_id);
-        if (!$user) {
-            common_log(LOG_WARNING, 'Confirmation for unknown user ' . $confirm->user_id);
-            return;
-        }
-        $success = jabber_confirm_address($confirm->code,
-                                          $user->nickname,
-                                          $confirm->address);
-        if (!$success) {
-            common_log(LOG_ERR, 'Confirmation failed for ' . $confirm->address);
-            # Just let the claim age out; hopefully things work then
-            return;
-        } else {
-            common_log(LOG_INFO, 'Confirmation sent for ' . $confirm->address);
-            # Mark confirmation sent; need a dupe so we don't have the WHERE clause
-            $dupe = Confirm_address::staticGet('code', $confirm->code);
-            if (!$dupe) {
-                common_log(LOG_WARNING, 'Could not refetch confirm', __FILE__);
-                return;
-            }
-            $orig = clone($dupe);
-            $dupe->sent = $dupe->claimed;
-            $result = $dupe->update($orig);
-            if (!$result) {
-                common_log_db_error($dupe, 'UPDATE', __FILE__);
-                # Just let the claim age out; hopefully things work then
-                return;
-            }
-        }
-        return true;
-    }
-
-    protected function next_confirm()
-    {
-        $confirm = new Confirm_address();
-        $confirm->whereAdd('claimed IS null');
-        $confirm->whereAdd('sent IS null');
-        # XXX: eventually we could do other confirmations in the queue, too
-        $confirm->address_type = 'jabber';
-        $confirm->orderBy('modified DESC');
-        $confirm->limit(1);
-        if ($confirm->find(true)) {
-            common_log(LOG_INFO, 'Claiming confirmation for ' . $confirm->address);
-                # working around some weird DB_DataObject behaviour
-            $confirm->whereAdd(''); # clears where stuff
-            $original = clone($confirm);
-            $confirm->claimed = common_sql_now();
-            $result = $confirm->update($original);
-            if ($result) {
-                common_log(LOG_INFO, 'Succeeded in claim! '. $result);
-                return $confirm;
-            } else {
-                common_log(LOG_INFO, 'Failed in claim!');
-                return false;
-            }
-        }
-        return null;
-    }
-
-    protected function clear_old_confirm_claims()
-    {
-        $confirm = new Confirm();
-        $confirm->claimed = null;
-        $confirm->whereAdd('now() - claimed > '.CLAIM_TIMEOUT);
-        $confirm->update(DB_DATAOBJECT_WHEREADD_ONLY);
-        $confirm->free();
-        unset($confirm);
-    }
-
-    /**
-     * Make sure we're on the right site configuration
-     */
-    protected function switchSite()
-    {
-        if ($this->site != common_config('site', 'server')) {
-            common_log(LOG_DEBUG, __METHOD__ . ": switching to site $this->site");
-            $this->stats('switch');
-            StatusNet::init($this->site);
-        }
-    }
-}